Callogobius nigromarginatus, a new species of Goby (Pisces : Gobiidae) from Taiwan

Callogobius nigromarginatus, was collected from muddy-sand bottom close to a reef flat in Taitung County, southeastern Taiwan. This species has 25-26 lateral scale rows, thus belonging to the group with fewer scale rows as pr oposed by Goren et al. (1991). Diagnostic characters of this species includ e: fewer predorsal scales (5), 7-8 transverse scale rows, with posterior oc uloscapular pores, three preopercular pores, pelvic fraenum present, and di stinctive color pattern (broad stripe on 2nd dorsal and anal fin in adult). A key to all eight species of this low-scale-row group is also presented.